This ebook version of Oliver Optic's The Boat Club has been made available in multiple formats by the Open Library. Editions of the full novel, organized by year of publication, may be accessed here.

This ebook version of Oliver Optic's Brave Old Salt , Or, Life On The Quarter Deck has been made available in multiple formats by the Open Library. Editions of the full novel, organized by year of publication, may be accessed here.

This ebook version of Oliver Optic's On The Blockade has been made available in multiple formats by the Open Library. Editions of the full novel, organized by year of publication, may be accessed here.

In Spanish. This unit will show you the existence of optical illusions. It will make you think about perception.

This ebook version of Oliver Optic's On Time has been made available in multiple formats by the Open Library. Editions of the full novel, organized by year of publication, may be accessed here.

An illustrated article helps students understand the concept of reflection of images and the differences in reflection with different optical devices.

An optical illusion created using Leonardo's well-known portrait of the Mona Lisa serves as source material for an exercise in perception.

Recreate this optical illusion using two parabolic mirrors to make it appear like an object is in the center, when it is really just its image. This experiment requires special equipment which may need to be purchased.

Create this optical illusion that incorporates what is known as the waterfall effect.

Explore the behavior of light as it reflects off a concave mirror in this optical illusion.

After discussing the basics of the eye, this site explores the various functions of the eye and parts from the optic nerves to the retina. Cones, rods, and the brain are also discussed.

Observe many figures that look impossible to the eye and enjoy many of the optical illusions shown. [In Spanish]

Two examples of optical illusions that demonstrate aspects of how we perceive color.

An in-depth look at how Matisse used color and at how contemporary theories about optics and color influenced his work. The essay describes how a group of artists along with Matisse--Van Gogh, Gauguin, and Seurat among them--became tired...

Learn all about sundogs, an optical phenomenon in the atmosphere.

Provides an explanation of exactly what optical illusions are, and gives a few basic examples to illustrate the text.

An activity to demonstrate how light behaves when encountering an obstacle, in this case, wax blocks placed in a ripple tank. Includes an explanation of the diffraction that occurs.

An investigation, using a ripple tank, into how waves behave when they collide with each other. With an explanation of what is observed, and a link to an article on refraction.

An investigation into how polarized light behaves, with instructions on how to make a polarizer using glass slides. With a link to an article explaining about polarized light. PDF (requires Adobe Reader).

Instructions on how to make a color wheel that spins to produce white. With links to scientific, academic articles that explain what is happening.

A simple activity to demonstrate how light separates into colors when it passes through water acting as a prism.

An experiment with a coffee filter and a marker to see what happens when water touches a black dot, or any other color. With links to several scientific, academic articles that explain what is happening.

An investigation into the total internal reflection of light, using a laser pointer. Accompanied by an explanation of what's happening, a discussion of Snell's Law, and links to additional information.

An experiment using Jell-O to create lenses, to see how light behaves with flat, concave, and convex lens surfaces. With an explanation of what is observed, and a link to an informative article on lenses.